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Sunday, May 10, 2020 | History

2 edition of microstructural and electrochemical study of porous silicon found in the catalog.

microstructural and electrochemical study of porous silicon

Jacques D. L"Ecuyer

microstructural and electrochemical study of porous silicon

by Jacques D. L"Ecuyer

  • 362 Want to read
  • 16 Currently reading

Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D.)-University of Birmingham, Department of Metallurgy and Materials.

Statementby Jacques D.L"Ecuyer.
ID Numbers
Open LibraryOL13928128M

Porous silicon samples were prepared by electrochemical etching p-type () silicon wafers with a resistivity of , 1, 4 and 15Ω cm. These etched samples are re-ferred to in this manuscript as samples 1, 2, 3 and 4, re-spectively. The electrolyte consisted of HF, IPA and DIW. To examine the wettability of the electrolyte to SiCited by: Flow microcalorimetry has been used to study microporous silicon produced by electrochemical corrosion of bulk p‐type silicon wafers in highly concentrated (50 wt %) aqueous hydrofluoric acid.

  Porous silicon has been intensively studied in the last two decades; however, the information about the macroscopic anisotropy of the electrochemical etching rate is scarce [], and its quantitative characteristics are at all lacking. A possible reason is that no appropriate method of study has been developed so by: 5. You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them.

Porous silicon fabrication. Porous silicon (P-Si) etching was performed in a homemade electrochemical cell using a spiral Pt counterelectrode. Highly boron-doped (– Ωcm) silicon wafers were utilized in an etch process of duration seconds with a current density of 45 mA/cm 2 in a v/v HF (50% H 2 O by volume) and ethanol Cited by:   Abstract. Although electrochemical transducers are attractive options in the field of biosensing due to their practicability, simplicity, low power requirements, and low cost, porous silicon electrochemical biosensors have not received as much attention as optical ones.


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Microstructural and electrochemical study of porous silicon by Jacques D. L"Ecuyer Download PDF EPUB FB2

The role of hydrochloric acid in the fabrication of porous silicon was investigated with atomic force microscopy (AFM) and spectroscopic ellipsometry. The study was focused on surface morphology, in terms of roughness and power spectral density (PSD), and layer microstructure and quality in terms of thickness, porosity, interface sharpness and layer homogeneity.

Furthermore, employing HCl in the electrochemical etching process of low doped p-type silicon was reported to transform the spongelike structure of the PS into a wirelike structure and consequently enhance the photoluminescence intensity. Hence, there is a strong correlation between microstructural and electrochemical study of porous silicon book luminescence properties of the material and its surface and microstructural by: Porous silicon samples were prepared by electrochemical etching p-type () silicon wafers with a resistivity of1, 4 and 15 Ωcm.

These etched samples are referred to in this manuscript as samples 1, 2, 3 and 4, by: Microstructural and mechanical evaluation of porous biomorphic silicon carbide for high temperature filtering applications Author links open overlay panel M.A.

Bautista a J. Quispe Cancapa b J. Martinez Fernandez a M.A. Rodríguez c M. Singh dCited by: Abstract The role of hydrochloric acid in the fabrication of porous silicon was investigated with atomic force microscopy (AFM) and spectroscopic ellipsometry.

The study was focused on surface morphology, in terms of roughness and power spectral density (PSD), and layer microstructure and quality in terms of thickness, porosity, interface. Due to its good physical and chemical properties, porous silicon (PSi) is very attractive to study.

In this research, PSi has been fabricated on n-type Si () by the electrochemical anodization method. The electrolyte solution used was a mixture of HF (40%), ethanol (99%) and aquadest with volume ratio ofby: 1.

The structural and optical features of Porous Silicon(PS) were investigated; the porous silicon was prepared by electrochemical etching of silicon wafers in HF : Junwen Xu. Fundamentals of Porous Silicon Preparation Introduction Porous silicon was accidentally discovered by the Uhlirs, a husband and wife team working at Bell Laboratories in the mid s.

They were trying to develop an electrochemical method to machine silicon wafers. attained. In this, way porous silicon is useful in solar application as antireflection material to reduce the surface loss of incident light.

Conclusion The electrochemical preparation of porous silicon has been presented and characterized. The filmetric measurement showed an increment in the porosity and.

Electrochemistry of Porous Materials. Book Review Chromatographia72 The results of an investigation on the Er doping of porous silicon are presented. Electrochemical impedance Author: Edmond Magner. Small‐angle x‐ray scattering was used to investigate the microstructural change induced by electrochemical oxidation of porous silicon (PS) layers.

It is shown that when the oxidation level increases, the size of the crystalline Si domains, which constitute the PS layer, by:   Porous layers were produced on a p-type () Si wafer by electrochemical anodic etching. The morphological, nanostructural and optical features of the porous Si were investigated as functions of the etching conditions.

As the wafer resistivity was increased from to 15 Ωcm, the etched region exhibited ‘sponge’, ‘mountain’ and ‘column’-type by: CHAPTER 2. FUNDAMENTALS OF POROUS SILICON AND APPLICATIONS 8 Fig. Schematic diagram of the porous silicon anodization circuit.

In this section we outline only the more basic electrochemical features of the i-V relationships. Fig. shows the typical curves for n- and p-type i-V silicon in aqueous HF. Porous silicon finds numerous applications in the areas of bio-technology, drug delivery, energetic materials and catalysis.

Recent studies by Vesta Sciences have led to the development of porous silicon nanosponge particles from metallurgical grade silicon powder through their own patented chemical etching process (Irish patent no. IE). Written by an outstanding, well-recognized expert in the field, this book provides detailed, step-by-step instructions to prepare and characterize the major types of porous silicon.

It is intended for those new to the fi eld. Sampling of topics covered: * Principles of Etching Porous Silicon.

Books. Publishing Support. Login. The Electrochemical Society was founded in to advance the theory and practice at the forefront of electrochemical and solid state science and technology, and allied subjects. A microstructural investigation of porous silicon films, related with a study of carriers transport, is presented.

Cited by: Within this study we report on the impact of the pyrolysis temperature on the structural and electrochemical properties of porous carbon-rich polymer-derived silicon carbonitride (SiCN) ceramics. Microstructural features of the synthesized materials were characterized in detail and discussed with respect to the lithium storage by: 4.

Few-layer graphene sheet-passivated porous silicon (PSi) as an outstanding electrochemical double-layer supercapacitor electrode was demonstrated.

The PSi matrix was formed by electrochemical etching of a doped silicon wafer and was further surface-passivated with few-layer graphene sheets by a Ni-assisted chemical vapor deposition process where a wide range of porous Cited by: 4. Porous Silicon Nanostructures as Effective Faradaic Electrochemical Sensing Platforms.

Keying Guo. Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia The electrochemical performance of porous silicon (pSi) stabilized via thermal decomposition of Cited by: 3.

1 Microstructural Characterisation of Metallurgical Grade Porous Silicon Nanosponge Particles E.G. Chadwick 1,2 Sergey Beloshapkin 1 and D.A. Tanner 1,2* 1Materials & Surface Science Institute, 2Department of Design & Manufacturing Technology, University of Limerick, Ireland *E-mail: @, Tel: (0); Fax: (0).

Abstract. Porous silicon is a promising template for the preparation of metal nanostructures by electrochemical deposition. Because porous silicon is a semiconductive porous electrode, electrochemical deposition of metals occurs not only at the bottom of pores but also on the pore wall and pore openings.The work shows that the study of the positronium formed when a positron is implanted into the porous surface provides valuable information on the pore distribution and open pore interconnectivity, which suggests that positron annihilation spectroscopy is a useful tool in the porous silicon .Few-layer graphene sheet-passivated porous silicon (PSi) as an outstanding electro chemical double-layer supercapacitor electrode was demonstrated.

The PSi matrix was formed by electrochemical etching of a doped silicon wafer and was further surface-passivated with few-layer graphene sheets by a Ni-assisted chemical vapor deposition process where aCited by: 4.